[hpsdr] HPSDR Wiki changes made

[Don AE5K]

This evening (US time), the HPSDR Wiki was restructured to allow each
project (sub-project?) or card/module to have its own wiki page.  More
changes will be made, but note that you'll need one more click now to
get to the desired project page.  This was done since the page with
everything on it was reaching a size where some web browsers would start
balking (so they say), and besides, it was just getting way too long to
scroll.  Thanks again to all the project leaders and workers for keeping
the wiki up to date -- it is your best source of info after the
discussion list.

73,
Don AE5K